288 The Irish Naturalist December, 



As regards the Irish t5'pes of distribution^ the following 

 table speaks for itself: — 



It will be seen that the group best represented is the 

 "Marginal type, a calcifuge and monticole assemblage. The 

 large Central group is entirely absent. In its comparative 

 poverty in Connacian plants, in which it might be expected 

 to excel, Achill accords with Clare Island and other w^estern 

 insular areas. Three Ultonian -^Xo-uis—Epilobitwi angusti- 

 foliu7n^ Vaccini2i7)i Vitis-Idcsa, Potarnogetoii filifornm — extend 

 down to Achill ; all reach here, or hereabouts, their southern 

 limit on the west coast. Mumonian plants, on the other 

 hand, are completely absent. The only I^agenian species is 

 the probably introduced Glyce^ia aquatica. 



As regards Watson's types, Germanic plants are altogether 

 absent, and English type very poorly represented. Of the 

 Atlantic group, which is in Great Britain w^estern, in Ireland 

 marginal with a southern tendency, Achill is comparatively 

 rich, possessing 12 out of 33 in Ireland. Of Scottish type 

 plants, which in Ireland are northern-marginal, with a 

 western tendency, Achill has 13 out of 50 in Ireland ; in these 

 figures RammcnliLS scotiais and Cochlearia grcenlajidica are not 

 included, not being classed by Watson. In the Highland 

 type Achill is comparatively rich, having 10 species out of 

 42 in Ireland. 



Compa7'ison with Clare Island. — It is natural that some 

 comparison should be made between the Achill flora and that 

 of Clare Island, which I surveyed in a similar manner last 

 year ; but a very few notes on this point must suffice. The 

 main features of such a comparison may be displayed as 

 follows : — 



Clare I. Achill I. 



Area, .... 6^ sq. m. 57 sq. m. 



Min. distance from land, . 3 miles. \ mile. 



Greatest elevation, . . 1,520 feet. 2,204 feet. 



Total flora, . . . 368 416 



Plants peculiar to each, . 40 ^ 



